Shoe-nail



.UNIT-ED' STATES 'PATENT OFFICE.

DANIEL C. KNOWLTON, OF BOSTON, MASSACHUSETTS.

SHOE-NAIL.

SPECIFICATION forming part of Letters Patent No. 236,823, dated January 18, 1881.

Application filed December 16, 1880. (No model.)

To all whom it may concern Be it known that I, DANIEL C. KNowLToN, of Boston, inthe county of Sut'olk and Commonwealth of Massachusetts, have invented a new and useful Improvement in Shoe-Nails or Sole-Fastenings, of which the following, taken in connection with the drawings, is a specification.

The object of my invention is to produce a shoe-nail or sole-fastening having a clinchpoint so formed as to enter and penetrate the sole-leatherreadilyundertheforceof the driver, with the top of the nail without any enlargement of the wire from which it is made and without any projectin g shoulder at or near the top.

Figure 1 of the drawings annexed shows a side View of the nail. Fig. 2 shows a crosssection at about the middle of the length of the nail. Fig. 3 shows a cross-section ot' sole with a nail in it as driven and clinched on the inner side.

The top of Fig. l shows the full size of the wire from which the nail is cut, while at the point or bottom of the nail nearly the whole body of the wire is cut away. y

I make this improved nail from wire of proper size and exterior form, corrugated or otherwise, by cutting away about one-third of the body of metal of the wire from which the nail is made by a diagonal line drawn from the outside of the wire at the top or head of the nail across it to the bottom or point of the nail, leaving for the point of the nail about one-eighth of the diameter of the wire. This diagonal line by which the metal is cut away may be direct, or it may be slightlycurved to give a greater thickness to the nail toward the point than a direct line would allow.

This nail, when driven into its place in the sole, shows on the outer surface only the diameter of the wire from which it is cut, and the surface of the leather is not depressed around it. One side of the nail being fiat, it cannot turn around in the leather, as a nail with a round shank often does, after the shoe has been worn somewhat.

In using these nails the point will uniformly turn at a right angle with the hat surface.

The half-round side of this nail is straight from head to point, and the flat side has the form of a wedge, and this, iu connection with the roughness or ,usual corrugations on the straight half-round side and the clinch of the point, unites the soles and upper of the shoe as substantially and durably as it can be by any known form of nail, and does not diminish the exibility of the sole. At the same time the nail is cut from the wire more easily than a nail with a head or shoulder at the top.

I claim- 'lhe above -described improved shoe-nail, consisting of a piece of metallic wire having one side parallel to its axial line and the opposite side flat and tapering by a diagonal line from the outside ot' the wire at the head, crossing the axial line below the middle to near the straight side at the point, substantially as described.

DANIEL O. KNOWLTON.

Witnesses:

OHs. HOUGHTON, FRED. L. HoU-eHToN. 

